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INFO: rcu detected stall in rtnl_newlink (2)

Status: upstream: reported on 2024/03/13 06:43
Reported-by: syzbot+841f969124fef34ec95c@syzkaller.appspotmail.com
First crash: 49d, last: 25d
▶ ▼ Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: rcu detected stall in rtnl_newlink batman C done inconclusive 201 575d 1377d 0/26 auto-obsoleted due to no activity on 2023/02/01 16:38
upstream INFO: rcu detected stall in rtnl_newlink (4) batman C error 6 2d20h 62d 25/26 internal: reported C repro on 2024/02/29 13:10
upstream INFO: rcu detected stall in rtnl_newlink (3) batman C error done 3 250d 300d 0/26 auto-obsoleted due to no activity on 2023/12/03 18:15
linux-6.1 INFO: rcu detected stall in rtnl_newlink 1 205d 205d 0/3 auto-obsoleted due to no activity on 2024/01/17 21:04
linux-5.15 BUG: soft lockup in rtnl_newlink origin:lts-only C inconclusive 61 18d 419d 0/3 upstream: reported C repro on 2023/03/09 19:16
linux-4.19 INFO: rcu detected stall in rtnl_newlink C error 7 505d 1378d 0/1 upstream: reported C repro on 2020/07/24 01:06
upstream INFO: rcu detected stall in rtnl_newlink (2) net 1 444d 444d 0/26 auto-obsoleted due to no activity on 2023/05/13 18:46
android-5-15 BUG: soft lockup in rtnl_newlink 2 13d 13d 0/2 premoderation: reported on 2024/04/18 11:40
linux-4.14 BUG: soft lockup in rtnl_newlink 1 826d 826d 0/1 auto-closed as invalid on 2022/05/26 06:33

Sample crash report:
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	1-...!: (1 GPs behind) idle=1a6c/1/0x4000000000000000 softirq=42437/42444 fqs=4
	(detected by 0, t=10502 jiffies, g=54117, q=161 ncpus=2)
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12495 Comm: syz-executor.4 Not tainted 6.1.81-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:__this_cpu_preempt_check+0x0/0x10 lib/smp_processor_id.c:65
Code: 4c 89 fe 4c 89 f2 e8 48 e3 fd ff 48 8b 74 24 30 48 c7 c7 c0 2a 3d 8b e8 37 e3 fd ff e8 34 9b ff ff eb a9 e8 a2 e6 ff ff 66 90 <48> 89 fe 48 c7 c7 40 2a 3d 8b e9 e1 fe ff ff cc eb 1e 0f 1f 00 48
RSP: 0018:ffffc900001e0c70 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffff88807d27d940
RDX: ffff88807d27d940 RSI: ffff888078699300 RDI: ffffffff8aebfec0
RBP: 0000000000000001 R08: ffffffff88b3b1cb R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000046
R13: ffff88807d27d940 R14: 00000000ffffffff R15: ffff888078699300
FS:  00007f04ab2716c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e9d0d66e4 CR3: 00000000187c0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lock_is_held_type+0xfd/0x180 kernel/locking/lockdep.c:5706
 lock_is_held include/linux/lockdep.h:283 [inline]
 advance_sched+0x13d/0x970 net/sched/sch_taprio.c:705
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:console_emit_next_record+0xc69/0xea0 kernel/printk/printk.c:2751
Code: 00 e8 bb 31 1c 00 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 ab 31 1c 00 eb 06 e8 a4 31 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <42> c7 04 2b 00 00 00 00 4a c7 44 2b 0a 00 00 00 00 4a c7 44 2b 12
RSP: 0018:ffffc9000e6de940 EFLAGS: 00000287
RAX: ffffffff816e4d6c RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc90012e15000 RSI: 0000000000003a3e RDI: 0000000000003a3f
RBP: ffffc9000e6debf0 R08: ffffffff816e4d47 R09: fffffbfff2092a45
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: 1ffff92001cdbd3c R14: 0000000000000001 R15: 0000000000000000
 console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
 vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
 _printk+0xd1/0x111 kernel/printk/printk.c:2293
 __nla_validate_parse+0x229d/0x2b70 lib/nlattr.c:619
 __nla_parse+0x3c/0x50 lib/nlattr.c:704
 __nlmsg_parse include/net/netlink.h:748 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:789 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3455 [inline]
 rtnl_newlink+0x2d9/0x2050 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6121
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514
 ___sys_sendmsg net/socket.c:2568 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2597
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f04aa47dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f04ab2710c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f04aa5abf80 RCX: 00007f04aa47dda9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f04aa4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f04aa5abf80 R15: 00007ffec39dbd78
 </TASK>
rcu: rcu_preempt kthread timer wakeup didn't happen for 10493 jiffies! g54117 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: 	Possible timer handling issue on cpu=0 timer-softirq=33467
rcu: rcu_preempt kthread starved for 10494 jiffies! g54117 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:I stack:27032 pid:16    ppid:2      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5245 [inline]
 __schedule+0x142d/0x4550 kernel/sched/core.c:6558
 schedule+0xbf/0x180 kernel/sched/core.c:6634
 schedule_timeout+0x1b9/0x300 kernel/time/timer.c:1935
 rcu_gp_fqs_loop+0x2d2/0x1120 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0xa3/0x3a0 kernel/rcu/tree.c:1905
 kthread+0x28d/0x320 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:307
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 PID: 12496 Comm: syz-executor.0 Not tainted 6.1.81-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x1fb9/0x3460 kernel/smp.c:998
Code: e8 ec 42 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 77 3f 0b 00 e9 1b ff ff ff f3 90 42 0f b6 04 2b 84 c0 75 14 <41> f7 07 01 00 00 00 0f 84 fe fe ff ff e8 55 3f 0b 00 eb e1 44 89
RSP: 0018:ffffc9000e75f780 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 1ffff110173281b1 RCX: ffff8880296b0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000e75fb60 R08: ffffffff817f3f84 R09: fffffbfff2092a45
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940d88
FS:  000055555733b480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e21000 CR3: 0000000024100000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1334 [inline]
 text_poke_bp_batch+0x2bb/0x940 arch/x86/kernel/alternative.c:1534
 text_poke_flush arch/x86/kernel/alternative.c:1725 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1732
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 __static_key_slow_dec_cpuslocked+0x107/0x160 kernel/jump_label.c:248
 __static_key_slow_dec kernel/jump_label.c:255 [inline]
 static_key_slow_dec+0x4d/0x90 kernel/jump_label.c:270
 bpf_stats_release+0x1f/0x30 kernel/bpf/syscall.c:4817
 __fput+0x3b7/0x890 fs/file_table.c:320
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5e9c47cc9a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007fff7b529cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f5e9c47cc9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000032 R08: 0000001b33220000 R09: 0000000000000023
R10: 0000000081328f92 R11: 0000000000000293 R12: 00007f5e9c000638
R13: ffffffffffffffff R14: 00007f5e9c000000 R15: 00000000000714c9
 </TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 225s! [syz-executor.0:12496]
Modules linked in:
irq event stamp: 50370
hardirqs last  enabled at (50369): [<ffffffff8aa00d46>] asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
hardirqs last disabled at (50370): [<ffffffff8a896c7a>] sysvec_apic_timer_interrupt+0xa/0xb0 arch/x86/kernel/apic/apic.c:1106
softirqs last  enabled at (1374): [<ffffffff81327868>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last  enabled at (1374): [<ffffffff81327868>] fpregs_lock arch/x86/include/asm/fpu/api.h:72 [inline]
softirqs last  enabled at (1374): [<ffffffff81327868>] fpu_clone+0x258/0xc80 arch/x86/kernel/fpu/core.c:602
softirqs last disabled at (1372): [<ffffffff81327868>] local_bh_disable include/linux/bottom_half.h:20 [inline]
softirqs last disabled at (1372): [<ffffffff81327868>] fpregs_lock arch/x86/include/asm/fpu/api.h:72 [inline]
softirqs last disabled at (1372): [<ffffffff81327868>] fpu_clone+0x258/0xc80 arch/x86/kernel/fpu/core.c:602
CPU: 0 PID: 12496 Comm: syz-executor.0 Not tainted 6.1.81-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:csd_lock_wait kernel/smp.c:424 [inline]
RIP: 0010:smp_call_function_many_cond+0x1fb5/0x3460 kernel/smp.c:998
Code: e6 01 31 ff e8 ec 42 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 0a e8 77 3f 0b 00 e9 1b ff ff ff f3 90 42 0f b6 04 2b <84> c0 75 14 41 f7 07 01 00 00 00 0f 84 fe fe ff ff e8 55 3f 0b 00
RSP: 0018:ffffc9000e75f780 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 1ffff110173281b1 RCX: ffff8880296b0000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000e75fb60 R08: ffffffff817f3f84 R09: fffffbfff2092a45
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000800000000
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff8880b9940d88
FS:  000055555733b480(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32e21000 CR3: 0000000024100000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 </IRQ>
 <TASK>
 on_each_cpu_cond_mask+0x3b/0x80 kernel/smp.c:1166
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1334 [inline]
 text_poke_bp_batch+0x2bb/0x940 arch/x86/kernel/alternative.c:1534
 text_poke_flush arch/x86/kernel/alternative.c:1725 [inline]
 text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1732
 arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
 __static_key_slow_dec_cpuslocked+0x107/0x160 kernel/jump_label.c:248
 __static_key_slow_dec kernel/jump_label.c:255 [inline]
 static_key_slow_dec+0x4d/0x90 kernel/jump_label.c:270
 bpf_stats_release+0x1f/0x30 kernel/bpf/syscall.c:4817
 __fput+0x3b7/0x890 fs/file_table.c:320
 task_work_run+0x246/0x300 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xde/0x100 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x60/0x270 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5e9c47cc9a
Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 03 7f 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 63 7f 02 00 8b 44 24
RSP: 002b:00007fff7b529cc0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f5e9c47cc9a
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 0000000000000032 R08: 0000001b33220000 R09: 0000000000000023
R10: 0000000081328f92 R11: 0000000000000293 R12: 00007f5e9c000638
R13: ffffffffffffffff R14: 00007f5e9c000000 R15: 00000000000714c9
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12495 Comm: syz-executor.4 Not tainted 6.1.81-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:check_preemption_disabled+0x6/0x110 lib/smp_processor_id.c:13
Code: de e8 2e 51 d9 f9 e9 6d ff ff ff cc cc cc cc cc cc cc cc cc 48 c7 c7 e0 29 3d 8b 48 c7 c6 20 2a 3d 8b eb 00 41 57 41 56 41 54 <53> 48 83 ec 10 65 48 8b 04 25 28 00 00 00 48 89 44 24 08 65 8b 1d
RSP: 0018:ffffc900001e0c58 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000002 RCX: ffff88807d27d940
RDX: ffff88807d27d940 RSI: ffffffff8aebfec0 RDI: ffffffff8b3d2a40
RBP: 0000000000000001 R08: ffffffff88b3b0f7 R09: 0000000000000003
R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000046
R13: ffff88807d27d940 R14: 00000000ffffffff R15: ffff888078699300
FS:  00007f04ab2716c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5e9d0d66e4 CR3: 00000000187c0000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <IRQ>
 lockdep_recursion_finish kernel/locking/lockdep.c:467 [inline]
 lock_is_held_type+0xfd/0x180 kernel/locking/lockdep.c:5706
 lock_is_held include/linux/lockdep.h:283 [inline]
 advance_sched+0x69/0x970 net/sched/sch_taprio.c:701
 __run_hrtimer kernel/time/hrtimer.c:1686 [inline]
 __hrtimer_run_queues+0x5e5/0xe50 kernel/time/hrtimer.c:1750
 hrtimer_interrupt+0x392/0x980 kernel/time/hrtimer.c:1812
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1095 [inline]
 __sysvec_apic_timer_interrupt+0x156/0x580 arch/x86/kernel/apic/apic.c:1112
 sysvec_apic_timer_interrupt+0x8c/0xb0 arch/x86/kernel/apic/apic.c:1106
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:653
RIP: 0010:console_emit_next_record+0xc69/0xea0 kernel/printk/printk.c:2751
Code: 00 e8 bb 31 1c 00 44 0f b6 74 24 1f 4d 85 e4 75 07 e8 ab 31 1c 00 eb 06 e8 a4 31 1c 00 fb 48 c7 84 24 a0 00 00 00 0e 36 e0 45 <42> c7 04 2b 00 00 00 00 4a c7 44 2b 0a 00 00 00 00 4a c7 44 2b 12
RSP: 0018:ffffc9000e6de940 EFLAGS: 00000287
RAX: ffffffff816e4d6c RBX: dffffc0000000000 RCX: 0000000000040000
RDX: ffffc90012e15000 RSI: 0000000000003a3e RDI: 0000000000003a3f
RBP: ffffc9000e6debf0 R08: ffffffff816e4d47 R09: fffffbfff2092a45
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000200
R13: 1ffff92001cdbd3c R14: 0000000000000001 R15: 0000000000000000
 console_unlock+0x278/0x7c0 kernel/printk/printk.c:2871
 vprintk_emit+0x523/0x740 kernel/printk/printk.c:2268
 _printk+0xd1/0x111 kernel/printk/printk.c:2293
 __nla_validate_parse+0x229d/0x2b70 lib/nlattr.c:619
 __nla_parse+0x3c/0x50 lib/nlattr.c:704
 __nlmsg_parse include/net/netlink.h:748 [inline]
 nlmsg_parse_deprecated include/net/netlink.h:789 [inline]
 __rtnl_newlink net/core/rtnetlink.c:3455 [inline]
 rtnl_newlink+0x2d9/0x2050 net/core/rtnetlink.c:3623
 rtnetlink_rcv_msg+0x818/0xff0 net/core/rtnetlink.c:6121
 netlink_rcv_skb+0x1cd/0x410 net/netlink/af_netlink.c:2508
 netlink_unicast_kernel net/netlink/af_netlink.c:1326 [inline]
 netlink_unicast+0x7d8/0x970 net/netlink/af_netlink.c:1352
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1874
 sock_sendmsg_nosec net/socket.c:718 [inline]
 __sock_sendmsg net/socket.c:730 [inline]
 ____sys_sendmsg+0x5a5/0x8f0 net/socket.c:2514
 ___sys_sendmsg net/socket.c:2568 [inline]
 __sys_sendmsg+0x2a9/0x390 net/socket.c:2597
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f04aa47dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f04ab2710c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f04aa5abf80 RCX: 00007f04aa47dda9
RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000003
RBP: 00007f04aa4ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f04aa5abf80 R15: 00007ffec39dbd78
 </TASK>

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/03/13 06:42 linux-6.1.y 61adba85cc40 db5b7ff0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: rcu detected stall in rtnl_newlink
2024/04/06 15:10 linux-6.1.y 347385861c50 ca620dd8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 BUG: soft lockup in rtnl_newlink
* Struck through repros no longer work on HEAD.